<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <style type="text/css">
        #form1{
            text-align: center;
        }
    </style>
</head>
<body>
<form action="loginAction.php" method="post" id="form1">
    <h2>登录界面</h2>
    卡号：<input type="text" name="username" id="" value="" /><br><br>
    密码：<input type="password" name="password" id="" value="" /><br><br>
    <input type="submit" value="登录" />
</form>
</body>
</html>